Elastic pump-rod



(No Model.)

W. C. WESTAWAY.

' ELASTIG PUMP ROD.

No. 480,756. PatentedvAug. 16, 1892.

UNITED STATES PATENT OFFICE.

IVALTER C. WESTAWAY, OF DECORAH, IOVA.

ELASTIC PUMP-Ron.

SPECIFICATION forming part of Letters Patent No. 480,756, dated August 16, 1892.

Application filed December 14, 1891. Serial No. 415.028. (No model.)

.To @ZZ whom t may concern.'

Be it known th at I, WALTER C. WEsrAwAY, acltizen of the United States ot' America, reslding at Decorah, in the county of VVinneshiek and State of Iowa, have invented certain new and useful Improvements in Elastic Pump-Rods, of which the following is a speciication.

' Referring to the accompanying drawings, wherein like reference-letters indicate like parts, Figure l is a side elevation; Fig. 2, a section in line 2 2 of Fig. i; and Figs. 3, 4, 5, and 6, sections taken, respectively` in lines 3 3,44,55,and66ofFig.l.

In Letters Patent No. 397,882, granted to me February l2, 1889, I have described and illustrated an elastic pump-rod adapted to windmill-pumps. The practical use of said pump-rod has demonstrated that it is unnecessary to give the rod any elasticity in its downward stroke, that it is quite difficult to tit the upper end of the spring-holder accurately to the upper section of theplunger-rod, and that it is desirable to improve the form of the spring-holder to simplify and cheapen its construction. Hence as a substitute for the spring-holder and its rigid connection to the upper section ot the plunger-rod, as described in my said Letters Patent,No. 397,882, I have devised a simpler and cheaper springholder with a iiexible connection to said upper section, and so arranged that the spring yields only during the upward movement of the rod, and I have found by practical experience that these improvements remedy all the defects and disadvantages of my former device.

In the drawings, F is the upper and A the lower section of the plunger-rod, and E the spring which renders the rod elastic. I now make the spring-holder as follows: To the section A, at a suitable distance below its upper end, a cross-head H is aitixed, preferably by a bolt b.v From the ends of the cross-head II two parallel rods g g extend upward through and are attached to an upper cross-head D, thus connecting the two cross-heads rigidly together. Bolted at f f to the upper section F are two iat metal straps K K, of common bar iron or steel, which extend downward to the cross-head H, and are there connected together by a block D', through which loosely passes the upper part of section A. The spring E is arranged between the block D and the cross-head D, and may be adjusted in tension by means ot screw-nuts on the end of rods g. A strut G is interposed between the fiat straps K just above the cross-head D, and may be provided with a vertical mortis-e g to receive the lower end of section F, it preferred. rlhe two straps are parallel with each other below the strut G and serve as guides for the cross-head D, the sides of which are grooved or rabbeted to fit the straps.

It, will be observed that the parts H D gg constitute a rectangular frame attached to the lower section A, while the parts D Gand those portions of the bars K which intervene between D G constitute a similar frame attached to the upper section F, the spring E being arranged between the members D D and bearing against each. The two frames together constitute what I have termed the spring holder. Above the strut G the straps converge to t-he sides of the section F and are sufliciently iiexible to enable them to be bent flat againstsaid sides and to be sprung out or in to accommodate them to sections F of larger or similar sizes.

By making the sides K of the upper frame of flat bar iron or steel, extended upward to connect to the rod F,a considerable savingis effected in cost ot construction, while the iiexible strap connection to the upper section thus obtained adapts the spring-holding device to be readily and easily fitted and attached to plunger-rods of different sizes and shapes. It will be seen that when the plunger is depressed the block D', seating upon cross-head H, will not allow the spring to come into action; but that when the plunger is lifted the block D will compress the spring against cross-head D, thus lifting section A without shock. No further provision for elasticity is necessary, because the pump-rod is subjected to no shock in changing from its upward to its downward stroke, and is put u'nder sudden strain onlyat the beginning of its upward movement.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

In an elastic pump-rod, the combination of the pump-rod sections A F, the spring E, the

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xed block D', the movable block D, and the tion F and attached to the sides of the latter 1o connecting members g', with two flat flexible section at a suieient distance yabove the strut metal straps K K, fastened to the lower block G to enable them to be flexed to conform to D', serving as guides for the upper movable rod-sections of various sizes, substantially as l 5 block D, above which block said straps are and for the purpose set forth.

secured to an interposed strut G for the pur- WALTER C. WESTAWAY. pose of holding them parallel to each other Witnesses:

between the blocks D D', said straps extend- E. W. D. HOLWAY,

ing upward from the strutGto the upper sece C. J. WEISER. 

